Busch might have a stomachache, too, if he thinks about his two Cup races at Daytona this season.

With his No. 18 Toyota out front and the checkered flag in sight Saturday night, Busch looked like he might snatch a win from Tony Stewart in the Coke Zero 400.

Instead, Busch ended up in the wall, out of contention and with another trip to the care center. Stewart, meanwhile, won his second race in five weeks and extended his lead in the series standings.

Jimmie Johnson was second, followed by Denny Hamlin, Carl Edwards and Kurt Busch.

Kyle Busch finished 14th,sliding across the finish line backward in a mangled car.

"It's a big disappointment," crew chief Steve Addington said. "We sat there, was patient all night long. We were just fine. We were in position to go for the win and we end up wrecked. What are you going to say?"

Busch said nothing.

He spent a few minutes inside the care center, blew off reporters and then bolted toward his motorhome on a golf cart.

"It's a tough place to race," Gibbs said.

Busch has learned that the hard way this season.

He led a race-high 88 laps in February's season-opening Daytona 500 and was certain he had a good enough car to make it to Victory Lane. Dale Earnhardt Jr. ended any chance he had of getting there.

Earnhardt triggered a massive wreck with 75 laps remaining, and Busch was right in the middle of the mess and ended up 41st.

He started the race eighth, worked his way up to second in the first 40 laps and then spent most of the 160-lap event waiting to make his move.

He did it shortly after a restart with four laps to go, hooking up with teammate Hamlin and sneaking by Stewart for the lead. All Busch had to do from there was hold off Stewart for 21/2 miles on the superspeedway.

Easier said than done, especially with those horsepower-sapping carburetor plates.

Stewart got some help from Johnson, chased down Busch and started calculating his next move. Stewart inched toward Busch's bumper, getting close enough to send Busch drifting up the track.

Busch turned back left to maintain his lead, then tried to slide in front of Stewart to block him. It was one move too many. As Busch crossed in front of Stewart's bumper, the cars made enough contact to turn Busch around and send him veering out of control.

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